# BU01 Reader vs CT Data Helper

The clearest difference is update cadence: CT Data Helper at every 5 weeks against BU01 Reader's every 2 months. BU01 Reader's advantage is iOS requirement (9.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

BU01 Reader ships an update every 2 months, CT Data Helper every 5 weeks. The most recent releases landed on September 26, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | BU01 Reader | CT Data Helper |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 1 MB | 27 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [育明 李](https://appshunter.io/developer/572761656) | [琳 贾](https://appshunter.io/developer/1674959382) |

## What reviewers say

### BU01 Reader

[App page](https://appshunter.io/ios/app/bu01-reader/id1435757804)

**Features:** macOS Compatibility

**In-app purchases:** none


### CT Data Helper

[App page](https://appshunter.io/ios/app/ct-data-helper/id6445966953)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BU01 Reader free?

BU01 Reader is free to download, with no in-app purchases.

### Is CT Data Helper free?

CT Data Helper is free to download, with no in-app purchases.

### Do BU01 Reader or CT Data Helper have ads?

Neither BU01 Reader nor CT Data Helper shows ads.

### Which is updated more often, BU01 Reader or CT Data Helper?

BU01 Reader ships an update every 2 months, and CT Data Helper every 5 weeks. Most recently, BU01 Reader was updated on September 26, 2026 and CT Data Helper on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*